| European Countries by First 2 Letters | 0 | - | 4.95 | 526,381 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,857 |
| Countries with the Most Skyscrapers | 0 | - | 4.92 | 143,438 |
| U.S. Cities with the Most Skyscrapers | 0 | - | 4.89 | 95,319 |
| Countries with the Tallest Buildings | 0 | - | 4.93 | 103,746 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,337 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,277 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,803 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,585 |
| Official European Union Languages | 0 | - | 4.97 | 236,600 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,708 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,227 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,451 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,543 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,569 |
| Tall Building Cities - United States | 0 | - | 4.48 | 68,261 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,242 |
| Celtic Nations | 0 | - | 4.69 | 46,812 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,846 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,931 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,050 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,966 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,420 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 110,919 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,868 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,725 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,228 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,909 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,680 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,637 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,029 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,319 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,607 |
| Famous Germans | 0 | - | 4.50 | 54,619 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,534 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,345 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,226 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,148 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,019 |
| States of Germany | 0 | - | 4.96 | 150,080 |
| Germany Immigration by Country | 0 | - | 4.84 | 80,024 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,525 |
| Regions of Italy | 0 | - | 4.92 | 74,732 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,821 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,362 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,199 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,226 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,428 |
| Champions League Winners | 0 | - | 4.92 | 996,424 |
| Asian Geography By Letter - B | 0 | - | 4.85 | 66,004 |
| Cities with the Tallest Buildings | 0 | - | 4.17 | 84,338 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,568 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,234 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,186 |
| Departments of France | 0 | - | 4.93 | 52,836 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,370 |
| England or Wales? | 0 | - | 4.94 | 45,320 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,505 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,226 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,674 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,912 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,289 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,500 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,177 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,927 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,300 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,518 |
| European Geography A-Z | 0 | - | 4.28 | 49,006 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,599 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,995 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,062 |
| Slavic Languages | 0 | - | 4.67 | 53,986 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,430 |
| The Mafia Quiz | 0 | - | 4.46 | 23,207 |
| History of The Netherlands | 0 | - | 4.46 | 17,311 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,250 |
| Name a Major European City A-Z | 0 | - | 4.33 | 49,132 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,845 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,517 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,555 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,962 |
| France A-Z | 0 | - | 4.16 | 38,058 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,981 |
| Name that Greek Letter | 0 | - | 4.94 | 321,689 |
| Switzerland A-Z | 0 | - | 4.45 | 25,509 |
| Africa A-Z | 0 | - | 4.57 | 46,373 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,546 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,141 |
| Famous Russians | 0 | - | 4.16 | 23,728 |
| History of Russia Quiz | 0 | - | 4.49 | 31,795 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,568 |
| Famous French People | 0 | - | 4.12 | 27,955 |
| Ancient Greece A-Z | 0 | - | 4.60 | 22,984 |
| The Trojan War | 0 | - | 4.83 | 39,431 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,543 |
| Famous Irish People | 0 | - | 4.05 | 45,855 |
| History of Italy | 0 | - | 4.55 | 31,817 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,169 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,053 |
| Roman Emperors | 0 | - | 4.95 | 118,496 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,483 |
| Famous Nordic People | 0 | - | 4.34 | 19,861 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,545 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,982 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,464 |
| People on Money - England | 0 | - | 4.29 | 16,564 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,332 |
| London A-Z | 0 | - | 4.10 | 40,638 |
| Asian Cities A-Z by Clue | 0 | - | 4.51 | 34,260 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,111 |
| Countries with the Most Skyscrapers per Capita | 0 | - | 4.69 | 72,158 |
| 100 Most Common English Words | 0 | - | 4.88 | 1,304,992 |
| Australian Capitals | 0 | - | 4.92 | 62,594 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,748 |
| Europe Map Quiz | 0 | - | 5.00 | 4,731,642 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,993 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,620 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,947 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,988 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,156 |
| Capitals of French Regions | 0 | - | 4.45 | 15,987 |
| Regions of France | 0 | - | 4.78 | 119,272 |
| France Immigration by Country | 0 | - | 4.72 | 75,968 |
| German Groups of Things | 0 | - | 4.46 | 38,306 |
| Capitals of German States | 0 | - | 4.74 | 28,812 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,097 |
| Germany True or False? | 0 | - | 4.61 | 48,535 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,465 |
| Olympian Gods Quiz | 0 | - | 4.96 | 496,226 |
| Ancient Greek Words | 0 | - | 4.92 | 110,709 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,831 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,048 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,969 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,124 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,352 |
| Famous Scottish People | 0 | - | 4.22 | 18,326 |
| Asian Geography By Letter - A | 0 | - | 4.64 | 70,833 |
| Asian Geography by Letter - H | 0 | - | 4.49 | 65,397 |
| Asian Geography By Letter - M | 0 | - | 4.47 | 61,167 |
| Asian Geography by Letter - P | 0 | - | 4.45 | 57,568 |
| Asian Geography by Letter - T | 0 | - | 4.50 | 57,079 |
| Asian Geography By Letter - L | 0 | - | 4.49 | 42,719 |
| Middle East A-Z | 0 | - | 4.47 | 45,789 |
| Most Common English Verbs - Extreme | 0 | - | 4.96 | 155,816 |
| Africa Map Quiz | 0 | - | 5.00 | 2,104,455 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,365 |
| Canada A-Z | 0 | - | 4.73 | 32,652 |
| European Physical Geography | 0 | - | 4.26 | 33,374 |
| Geography of Russia | 0 | - | 4.57 | 21,428 |
| Russian History A-Z | 0 | - | 4.38 | 30,846 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,777 |
| History of Austria | 0 | - | 4.70 | 17,749 |
| Geography of the French Empire | 0 | - | 4.48 | 26,936 |
| The French Revolution | 0 | - | 4.46 | 23,785 |
| France Multiple Choice | 0 | - | 4.38 | 40,635 |
| History of France | 0 | - | 4.59 | 56,060 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,384 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,584 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,619 |
| The Vikings! | 0 | - | 4.46 | 28,246 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,700 |
| The Portuguese Empire | 0 | - | 4.54 | 11,991 |
| American to British Word Translation | 0 | - | 4.06 | 119,582 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,705 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,394 |
| Champions League Top 4 | 0 | - | 4.77 | 133,829 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,440,540 |
| Asia Map Quiz | 0 | - | 4.99 | 907,106 |
| A Quiz About Islam | 0 | - | 4.31 | 48,209 |
| Countries That Don't Recognize Israel | 0 | - | 4.63 | 34,449 |
| Countries of Africa | 0 | - | 5.00 | 2,508,135 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,822 |
| African East Coast | 0 | - | 4.96 | 95,058 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,932 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,808 |
| Australia Map Quiz | 0 | - | 4.94 | 342,508 |
| U.S. Geography by Letter - B | 0 | - | 4.53 | 68,540 |
| U.S. Geography by Letter - S | 0 | - | 4.54 | 52,080 |
| U.S. Federal Holidays | 0 | - | 4.33 | 99,100 |
| United States Map Quiz | 0 | - | 4.98 | 4,142,014 |
| Two Letter U.S. State Abbreviations | 0 | - | 4.19 | 743,225 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,165 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,214 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,010 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,322 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,399 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,574 |
| Country Codes of Europe | 0 | - | 3.46 | 13,654 |
| The Only European Country ... | 0 | - | 4.91 | 213,862 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,554 |
| Austria... or Australia? | 0 | - | 4.68 | 103,874 |
| Presidents of France | 0 | - | 4.25 | 23,903 |
| Word Chain - France | 0 | - | 4.38 | 42,584 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,780 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,771 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,973 |
| Italian Foods | 0 | - | 4.31 | 72,203 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,958 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,959 |
| Canary Islands | 0 | - | 4.61 | 17,404 |
